| 城市污水连续流A/O系统富氧条件下脱氮特征 |
| |
| 引用本文： | 胡家玮,李军,卞伟,郑林雪,王盟.城市污水连续流A/O系统富氧条件下脱氮特征[J].化工学报,2014,65(10):4071-4077. |
| |
| 作者姓名： | 胡家玮 李军 卞伟 郑林雪 王盟 |
| |
| 作者单位： | 北京工业大学建筑工程学院, 北京 100124 |
| |
| 基金项目： | 国家水体污染控制与治理科技重大专项资助项目(2008ZX07314-009)。 |
| |
| 摘 要： | 基于添加流离填料的连续流A/O生物膜反应器，研究城市污水生物脱氮特征。系统在富氧条件（溶解氧大于1.5 mg·L-1）下连续运行113 d，氨氮和总氮去除率均稳定在50%。系统稳定运行阶段好氧区和出水均无亚硝酸盐或硝酸盐积累现象，表现出良好的同步硝化反硝化特征。16S rDNA分析表明，实现这一现象的主要功能细菌为好氧区存在的好氧反硝化菌；FISH分析表明，不同好氧区的好氧反硝化菌的活性和相对数量不同。结果证明系统内发生的同步硝化反硝化主要由好氧反硝化作用实现，硝化反应产生的硝酸盐类物质得到去除。根据试验结果与微生物学分析，提出了在富氧水环境中通过同步硝化反硝化途径脱氮的生物膜模型。
|
| 关 键 词： | A/O系统 生物膜 同步硝化反硝化 好氧反硝化 分子生物学 |
| 收稿时间： | 2014-03-17 |
| 修稿时间： | 2014-06-06 |
Denitrification characteristics in oxygen-enriched continuous anoxic/aerobic biofilm system for municipal wastewater treatment |
| |
| HU Jiawei,LI Jun,BIAN Wei,ZHENG Linxue,WANG Meng.Denitrification characteristics in oxygen-enriched continuous anoxic/aerobic biofilm system for municipal wastewater treatment[J].Journal of Chemical Industry and Engineering(China),2014,65(10):4071-4077. |
| |
| Authors: | HU Jiawei LI Jun BIAN Wei ZHENG Linxue WANG Meng |
| |
| Affiliation: | School of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China |
| |
| Abstract: | For municipal wastewater treatment, a continuous anoxic/aerobic system (A/O) combined with flow separate filler was developed to investigate nitrogen removal performance. A/O was running stably for 113 days under oxygen-enriched condition (dissolved oxygen, DO>1.5 mg·L-1). Removal of ammonia nitrogen and total nitrogen reached 50%, while nitrite and nitrate were not accumulating during the stable process. Simultaneous nitrification and denitrification was obvious in the aerobic zone. 16S rDNA results showed that functional bacterias were aerobic denitrifying bacteria (ADB) in the biofilm of the aerobic zone, and FISH results showed the activities of ADB along the aerobic zone. Aerobic denitrification was the main form of simultaneous nitrification and denitrification in the system, consuming nitrite and nitrate from nitrification. A nitrogen removal pathway model via simultaneous nitrification and denitrification in the biofilm under oxygen-rich water environment was established. |
| |
| Keywords: | anoxic/aerobic system biofilm simultaneous nitrification and denitrification aerobic denitrification molecular biology |
| 本文献已被 万方数据 等数据库收录！ |
| 点击此处可从《化工学报》浏览原始摘要信息 |
|
点击此处可从《化工学报》下载全文 |
